diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2013-06-10 09:57:07 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-25 14:07:41 -0700 |
| commit | 5c49b1cfa41e42003b481326af66806e5f1a46b9 (patch) | |
| tree | a38cf79d15af7c7a557fbcb4786bcdad25e1543c /drivers/gpu/drm/radeon/atombios_encoders.c | |
| parent | 9f7fbcd61507b130afb4ec6418ce8513295d4df4 (diff) | |
drm/radeon: add backlight quirk for hybrid mac
commit 80101790670385a85aca35ecae4b89e3f2fceecc upstream.
Mac laptops with multiple GPUs apparently use the gmux
driver for backlight control. Don't register a radeon
backlight interface. We may need to add other pci ids
for other hybrid mac laptops.
Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=65377
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/radeon/atombios_encoders.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_encoders.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c index 8406c8251fbf..4120d355cadd 100644 --- a/drivers/gpu/drm/radeon/atombios_encoders.c +++ b/drivers/gpu/drm/radeon/atombios_encoders.c @@ -186,6 +186,13 @@ void radeon_atom_backlight_init(struct radeon_encoder *radeon_encoder, u8 backlight_level; char bl_name[16]; + /* Mac laptops with multiple GPUs use the gmux driver for backlight + * so don't register a backlight device + */ + if ((rdev->pdev->subsystem_vendor == PCI_VENDOR_ID_APPLE) && + (rdev->pdev->device == 0x6741)) + return; + if (!radeon_encoder->enc_priv) return; |